where are the chemical weapons in syria? what would you do to attack them? what kind of u.s. bomber aircraft would you use? do you know precisely where they are? how will you get that bomber aircraft past syrian air defenses? and it's safe to assume that the neighboring countries, israel, turkey, jordan, their intelligence services also working this problem around the clock. there is a lot we know. there is growing concern by the hour, in the region, because if the syrians use these kind of weapons against their own people, catastrophic. but if they also use them, these weapons, the plume clouds, if you will, can cross borders, terrorists could get ahold of this kind of material if it's now out of secure locations and take it across borders into israel, jordan or turkey. it just doesn't get more serious than this. >> bob, you've been looking into how catastrophic these weapons could be. >> anderson, look at it this way, 122-millimeter artillery round with mixed sarin landing in the middle of a city will immediately kill 18,000 to 20,000 people. and that's in the first seconds